724
FNCA52 TJSJ 171930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST SAT OCT 17 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-180800-
SOUTHEAST COASTAL PLAINS-
330 PM AST SAT OCT 17 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 40 30
TEMP (24H TREND) 74 (-2) 91 (+2) 73 91
RH % (24H TREND) 92 (+4) 58 (-5) 92 58
WIND 20FT/EARLY(MPH) E 10 E 10 E 8 E 9
WIND 20FT/LATE(MPH) NE 6 SE 10 NE 5 SE 12
MIXING HGT(FT-AGL/MSL) 4850 4870
TRANSPORT WND (MPH) E 8 E 8
VENT RATE (KT-FT) 33950 34090
DISPERSION 5 5
DSI 3 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-180800-
SOUTHERN HILLS-
330 PM AST SAT OCT 17 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 50 10 40
TEMP (24H TREND) 70 (-3) 88 (+3) 70 88
RH % (24H TREND) 97 (+5) 62 (-4) 97 62
WIND 20FT/EARLY(MPH) E 6 E 8 E 6 E 8
WIND 20FT/LATE(MPH) E 5 SE 8 E 5 SE 9
MIXING HGT(FT-AGL/MSL) 5560 5510
TRANSPORT WND (MPH) E 8 E 8
VENT RATE (KT-FT) 38920 38570
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-180800-
NORTH COASTAL PLAINS-
330 PM AST SAT OCT 17 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 60 20 50
TEMP (24H TREND) 72 (-4) 90 (+1) 73 90
RH % (24H TREND) 98 (+6) 61 (-6) 97 61
WIND 20FT/EARLY(MPH) SE 12 SE 8 SE 9 E 9
WIND 20FT/LATE(MPH) SE 6 E 12 SE 6 E 12
MIXING HGT(FT-AGL/MSL) 4820 4810
TRANSPORT WND (MPH) E 7 E 7
VENT RATE (KT-FT) 28920 28860
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-180800-
NORTHERN HILLS-
330 PM AST SAT OCT 17 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 10 80 10 70
TEMP (24H TREND) 70 (-3) 89 (+2) 71 89
RH % (24H TREND) 99 (+4) 62 (-4) 98 62
WIND 20FT/EARLY(MPH) SE 9 SE 6 SE 5 E 6
WIND 20FT/LATE(MPH) LGT/VAR NE 9 LGT/VAR NE 9
MIXING HGT(FT-AGL/MSL) 5520 5300
TRANSPORT WND (MPH) E 6 SE 6
VENT RATE (KT-FT) 27600 26500
DISPERSION 5 5
DSI 1 6 1 5
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-180800-
WEST COAST-
330 PM AST SAT OCT 17 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 10 70 0 40
TEMP (24H TREND) 73 (0) 91 (+1) 73 91
RH % (24H TREND) 98 (+4) 61 (-3) 97 61
WIND 20FT/EARLY(MPH) E 6 E 8 E 6 E 8
WIND 20FT/LATE(MPH) E 8 E 9 E 6 SE 9
MIXING HGT(FT-AGL/MSL) 4580 4620
TRANSPORT WND (MPH) SE 6 E 6
VENT RATE (KT-FT) 22900 23100
DISPERSION 5 5
DSI 2 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-180800-
EASTERN INTERIOR-
330 PM AST SAT OCT 17 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 60 30 50
TEMP (24H TREND) 71 (-3) 89 (+2) 71 89
RH % (24H TREND) 97 (+4) 61 (-4) 97 60
WIND 20FT/EARLY(MPH) SE 8 SE 8 SE 8 E 9
WIND 20FT/LATE(MPH) SE 8 SE 11 SE 8 E 11
MIXING HGT(FT-AGL/MSL) 5970 5860
TRANSPORT WND (MPH) SE 8 E 9
VENT RATE (KT-FT) 41790 46880
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-180800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST SAT OCT 17 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 40 50
TEMP (24H TREND) 70 (-3) 86 (+4) 70 86
RH % (24H TREND) 100 (+4) 64 (-6) 99 63
WIND 20FT/EARLY(MPH) SE 6 SE 6 SE 6 E 8
WIND 20FT/LATE(MPH) E 5 SE 9 E 5 E 9
MIXING HGT(FT-AGL/MSL) 4670 4490
TRANSPORT WND (MPH) SE 8 E 9
VENT RATE (KT-FT) 32690 35920
DISPERSION 5 5
DSI 3 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-180800-
CENTRAL MOUNTAIN RANGE-
330 PM AST SAT OCT 17 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE NONE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 0 80 0 70
TEMP (24H TREND) 68 (-3) 87 (+5) 68 86
RH % (24H TREND) 99 (+5) 63 (-6) 98 64
WIND 20FT/EARLY(MPH) SE 5 SE 5 LGT/VAR E 5
WIND 20FT/LATE(MPH) LGT/VAR SE 5 LGT/VAR E 6
MIXING HGT(FT-AGL/MSL) 6270 5930
TRANSPORT WND (MPH) SE 6 SE 6
VENT RATE (KT-FT) 31350 29650
DISPERSION 5 5
DSI 1 5 1 5
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-180800-
CAYEY MOUNTAIN RANGE-
330 PM AST SAT OCT 17 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 40 50
TEMP (24H TREND) 70 (-2) 86 (+3) 70 85
RH % (24H TREND) 99 (+4) 63 (-5) 98 63
WIND 20FT/EARLY(MPH) E 6 E 6 E 5 E 6
WIND 20FT/LATE(MPH) LGT/VAR SE 9 LGT/VAR SE 9
MIXING HGT(FT-AGL/MSL) 5350 5360
TRANSPORT WND (MPH) E 8 E 9
VENT RATE (KT-FT) 37450 42880
DISPERSION 5 5
DSI 2 6 1 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-180800-
VIEQUES-
330 PM AST SAT OCT 17 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 50 50
TEMP (24H TREND) 78 (-1) 90 (+2) 78 90
RH % (24H TREND) 86 (+2) 59 (-4) 86 59
WIND 20FT/EARLY(MPH) E 11 E 8 E 10 E 10
WIND 20FT/LATE(MPH) E 10 SE 8 E 9 E 10
MIXING HGT(FT-AGL/MSL) 3220 3210
TRANSPORT WND (MPH) E 8 E 9
VENT RATE (KT-FT) 22540 25680
DISPERSION 5 5
DSI 6 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-180800-
CULEBRA-
330 PM AST SAT OCT 17 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 50 50
TEMP (24H TREND) 79 (-2) 89 (+1) 80 89
RH % (24H TREND) 84 (+3) 59 (-7) 83 59
WIND 20FT/EARLY(MPH) E 11 SE 8 E 10 E 10
WIND 20FT/LATE(MPH) E 10 SE 8 E 10 E 10
MIXING HGT(FT-AGL/MSL) 3170 3290
TRANSPORT WND (MPH) E 9 E 13
VENT RATE (KT-FT) 25360 36190
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-180800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST SAT OCT 17 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 10 20
TEMP (24H TREND) 74 (-2) 92 (+3) 74 92
RH % (24H TREND) 93 (+7) 57 (-4) 91 57
WIND 20FT/EARLY(MPH) E 10 E 11 E 9 E 10
WIND 20FT/LATE(MPH) E 10 SE 11 E 9 SE 13
MIXING HGT(FT-AGL/MSL) 4680 4770
TRANSPORT WND (MPH) E 10 E 9
VENT RATE (KT-FT) 42120 38160
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-180800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST SAT OCT 17 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 50 50
TEMP (24H TREND) 76 (-3) 87 (+1) 76 87
RH % (24H TREND) 89 (+4) 63 (-6) 87 63
WIND 20FT/EARLY(MPH) E 11 E 9 E 11 E 11
WIND 20FT/LATE(MPH) E 11 SE 9 E 10 E 10
MIXING HGT(FT-AGL/MSL) 3270 3310
TRANSPORT WND (MPH) E 10 E 13
VENT RATE (KT-FT) 29430 36410
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-180800-
ST CROIX-
330 PM AST SAT OCT 17 2026
TONIGHT SUN SUN NIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 50 40
TEMP (24H TREND) 77 (-2) 89 (+2) 77 89
RH % (24H TREND) 91 (+4) 63 (-6) 91 63
WIND 20FT/EARLY(MPH) E 11 E 10 E 9 E 11
WIND 20FT/LATE(MPH) E 11 SE 10 E 9 E 10
MIXING HGT(FT-AGL/MSL) 4280 4740
TRANSPORT WND (MPH) SE 10 E 13
VENT RATE (KT-FT) 38520 52140
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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